Legendary's King Ghidorah could cocoon itself or shed it's skin to become DEATH GHIDORAH!

that would be kind of interesting but i think it would be to close the muto story line from the first and im pretty sure will also be cocooning herself. its tradition 

No sorry but ghidorah is not an insect, hes a reptilian like creature, and reptiles don't cocoon themselves. Plus I think just sticking with ghidorah is good enough.

^What he said, but both ghidorah's are their own creature and have different origins.

Plus desghidorah has 4 legs

That would be a lot of cacooning. So most of the movie would be mothra and ghidorah in cacoons while I guess Rodan and Godzilla duke it out.

This really just wouldn't work because King Ghidorah and Death Ghidorah are separate monsters. Yes, they are both of the same species, but they aren't the same character. Maybe teasing Death Ghidorah when the humans discuss King Ghidorah's origin might be a better way to include Death Ghidorah.

Reptiles do not undergo metamorphosis by nature, and thus while this is a cool concept it does not work in a "grounded" and "realistic" themed movie like the franchise Legendary is putting together. The only time reptiles shed their skin is when the skin either dies away or, in the case of snakes, when they outgrow their old layer of skin and begin to grow.

I agree with THE KING OF THE MONSTERS